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SETTING THE ADDRESSES
Each aspiration channel uses loop communications to report its status
information to the CIE (Fire Panel). As a factory default, the unit will
report smoke alarm and sensor information at an associated sensor
address and general alerts and faults on a different module address.
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Figure 10: Address Switches
Sensor
The sensor address is set on rotary decade switches on the back of
the smoke sensing devices. The smoke sensors are located under
the sensor cover inside the unit (see Figure 9). The Smoke Sensors
section of Maintenance - later in the manual - shows how to remove
the sensors. As supplied, the default for channel 1 is Address 1; in 2
channel units (or when two sensors are fitted) the second device is
set to Address 2. (Note: The number of addresses available will be
dependent on panel capability, check the panel documentation for
information on this).
Any sensor address may be used except 0, whilst respecting the
panel's rules on co-operative Multi-Sensing* (see below) between the
NFXI-VIEW smoke sensors.
Note: The sensors communicate with the fire panel through the loop
connection whether the 24VDC power supply is on or not.
Module
The module address is set by means of rotary decade address switches
located behind the door of the unit. Use a screwdriver to rotate the
wheels to the desired address. The selected address refers to channel
1; on 2 channel units the device assigns the next (+1) module address
to channel 2 automatically. Hence, address 159 is not valid for channel
1. (Note: for control panels that use only 99 addresses, 99 is invalid
for channel 1.)
Note: The module address will only respond to a panel poll when in
Normal mode with the 24VDC power supply on.
* Co-Operative Multi-Sensing
Depending upon the panel used, the rules to define the co-operative
Multi-Sensing between the NFXI-VIEW smoke sensors differs. This
mode will allow an even higher sensitivity, but is only to be used for the
sensors within a single NFXI-ASD12-HS.
How to Set this up for the NF300, NF3000, NF500, NF5000 and
ID3000 Panels
The co-operative Multi-Sensing is automatically activated if the NFXI-
VIEW sensors on a loop are set to adjacent sensor addresses and if
they are also put into the same zone. Additionally, if cells are being
used, the cell numbers for the co-operative sensors must also be the
same.
How to Set this up for the NF50-A, NF50, NF50-S, ID60 and Pearl
Panels
The co-operative Multi-Sensing is automatically activated if the NFXI-
VIEW sensors on a loop are put into the same AWACS group. Setting
an AWACS group to 0 will disable co-operative Multi-Sensing for that
sensor.
N200-102-01
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POWERING UP
Using Default Settings
1. Connect a suitable 24VDC supply (complying with European
Standard EN 54-4) to pins 1 and 2 on terminal block T1 (See
Table 2)
2. Check the voltage at the connector. Make sure it is within the
required voltage range.
3. If the voltage is within the specified range, connect the power
connector to the unit.
4. Close and secure the housing door; verify the fan starts up and air
flows out of the exhaust port. The unit takes 1-3 minutes to initialise
and stabilise in normal mode.
EXTERNAL RESET
The default setting for the configurable external input is Device Reset
(terminal block T8). A momentary short circuit connection between
these terminals will cause the FAAST LT-200 unit to perform a reset.
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I56-6577-008
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